Suzuki SY413 Service Manual page 2710

TABLE B-5 A/C SIGNAL CIRCUITS CHECK (VEHICLE WITH A/C)
A / C
amplifier
INSPECTION
STEP
1 Check A/C (Input) Signal Circuit.
1) Check voltage at terminal E92-16.
While engine running and A/C
switch and/or heater blower switch
OFF (A/C is not operating)
While engine running and both
A/C switch and heater blower
switch ON (A/C is operating)
Are check result as specified?
2 Check A/C ON (Output) Signal Circuit.
1) Connect SUZUKI scan tool to DLC with ignition switch
OFF.
2) Turn ignition switch ON and check A/C switch on dis-
play under the each following conditions.
While engine running and A/C
switch and/or heater blower
switch OFF (A/C is not operating)
While engine running at idle speed
and both A/C switch and heater
blower switch ON (A/C is operating)
Are check result as specified?
ENGINE GENERAL INFORMATION AND DIAGNOSIS (G13/G16 ENGINE WITH WU TWC) 6-1-111
ACTION
: 10-14V
: About 0V
: OFF
: ON
E92-1
(A / C ON output / cut
signal)
E92–16
(A / C input signal)
YES
Go to Step 2. "Lg/B" circuit open
or short, poor
E92-16 or E97-4
connection Evapo-
rative temperature
is below 2.5_C
(36.5_F) or faulty
A/C system.
A/C signal circuits "G/R circuit open or
are in good condi- short, Poor perfor-
tion. mance of ECT sen-
sor, TP sensor, En-
gine start signal in-
putted, poor E92-1
or E97-8 connec-
tion or A/C amplifi-
er malfunction.
If none of the
above exists, sub-
stitute a known-
good ECM (PCM)
and recheck.
NO